should be ok. Creating the new law is the same cost as creating the old params, because the static functions have zero size.
Timo > 5. sep. 2021 kl. 16:18 skrev Dmitry Pavlov <dmitry.pav...@outlook.com>: > > > Timo, > > Ah, I see, the krw and krn in PcKrSw are not static, so I can, as you say, > effectively have any kind of state in the material law. > > Will not it damage the performance though? In my problem formulation, krw and > krn continuously depend on surfactant mole fraction. So I will have to create > as many FluidMatrixInteractions as there are cells. Is it OK? > > Best regards, > > Dmitry > > > > > >> On 05.09.2021 03:32, Timo Koch wrote: >> Hi Dmitry, >> >> sure this is still possible. If you want you can think of the >> FluidMatrixInteraction as a collection of MaterialLawParams only that these >> “params” now additionally have functions like sw(pc). So they are the >> (parametrized) “law”. Instead of separating parameters and (stateless) >> functions there are now in one class with state. So, if you want a law >> parametrized with different parameters, you construct a new law with new >> parameters (within the SpatialParams::fluidMatrixInteraction function). >> >> Hope this helps >> >> Timo >> >>> 5. sep. 2021 kl. 00:41 skrev Dmitry Pavlov <dmitry.pav...@outlook.com>: >>> >>> Hello, >>> >>> I have a confession to make. For quite some time, I have been using DuMux >>> 3.3, refusing to upgrade because my code uses MaterialLawParams >>> extensively, and in DuMux 3.4 it is no longer available. I saw the >>> deprecation notice in 3.3, but was too busy/lazy to look into the >>> alternative. >>> >>> Now I started to think about upgrade and... I do not know how to do with >>> FluidMatrixInteraction the things I have been doing with MaterialLawParams. >>> The changelog says: "A caller does not have to pass a `parameters` object >>> to the laws anymore". See, the necessity (capability) to pass this object >>> around allowed me to make by krw and krn effectively depending not only on >>> sw, but also on the concentration of a component (surfactant), and on the >>> pressure gradient. >>> >>> I obtained the surfactant concentration and pressure gradient in >>> SpatialParams::materialLawParams, then used them to calculate the capillary >>> desaturation coefficients, and then wrapped them into the returned instance >>> of MaterialLawParams, which was later happily passed to krw() and krn(). >>> >>> With DuMux 3.4 I see examples with different implementations of >>> FluidMatrixInteraction being used depending on position etc., but no >>> example where fluid variables other than sw affect the relative >>> permeability. Is this possible? >>> >>> Regards, >>> >>> Dmitry >>> >>> >>> _______________________________________________ >>> DuMux mailing list >>> DuMux@listserv.uni-stuttgart.de >>> https://listserv.uni-stuttgart.de/mailman/listinfo/dumux >> >> >> _______________________________________________ >> DuMux mailing list >> DuMux@listserv.uni-stuttgart.de >> https://listserv.uni-stuttgart.de/mailman/listinfo/dumux > _______________________________________________ > DuMux mailing list > DuMux@listserv.uni-stuttgart.de > https://listserv.uni-stuttgart.de/mailman/listinfo/dumux
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